Explanipedia

UV/optical active galactic nuclei reverberation mapping: using a SmallSat to trade time resolution for spatial resolution to study accretion disks around supermassive black holes at the centers of galaxies Open

Varoujan Gorjian, D. R. Ardila, Aaron J. Barth, Edward M. Cackett, Gisella De Rosa , et al. · 2025

Building SPARCS, an ultraviolet science CubeSat for exoplanet habitability studies, technology advancements, and mission training Open

Evgenya L. Shkolnik, D. R. Ardila, Logan Jensen, April D. Jewell, Tahina Ramiaramanantsoa , et al. · 2025

Multispectral and Morphological Study of a Lunar Far Side Crater in the South Pole–Aitken Basin Open

Eduardo Andres Delgadillo Monsalve, M. A. Higuera-G., D. R. Ardila · 2025

The South Pole–Aitken (SPA) basin is the largest and deepest impact structure on the Moon’s far side and the largest known impact crater in the Solar System. This region is of significant scientific interest due to its distinctive morpholo…

Building SPARCS, an Ultraviolet Science CubeSat for Exoplanet Habitability Studies, Technology Advancements, and Mission Training Open

Evgenya L. Shkolnik, D. R. Ardila, Logan Jensen, April D. Jewell, Tahina Ramiaramanantsoa , et al. · 2025

The Star-Planet Activity Research CubeSat (SPARCS) is a NASA-funded 6U-CubeSat mission designed to monitor ultraviolet (UV) radiation from low-mass stars. These stars' relatively high-frequency and high-energy UV flares significantly affec…

The impact of spatial resolution on inland water quality monitoring from space Open

Renato Prata de Moraes Frasson, D. R. Ardila, Joshua Pease, Erin L. Hestir, Courtney Bright , et al. · 2024

Remote sensing of inland waters can provide timely and global water quality information to a wide variety of stakeholders. One of the parameters that determines the feasibility of using optical space-based instruments for monitoring inland…

Ultraviolet Technology To Prepare For The Habitable Worlds Observatory Open

Sarah Tuttle, Mark Matsumura, D. R. Ardila, Pin Chen, Michael A. Davis , et al. · 2024

We present here the current state of a collection of promising ultraviolet technologies in preparation for the Habitable Worlds Observatory. Working with experts representing a significant number of groups working in the ultraviolet, we su…

Anomalous Flux Event in the TESS Sector 43 Light Curve of the White Dwarf Photometric Standard HZ 4 was Caused by a Passing Asteroid Open

Keaton J. Bell, D. R. Ardila, Alexandra Frymire · 2023

Frymire & Ardila reported an anomalous flux variation in the Transiting Exoplanet Survey Satellite (TESS) Sector 43 light curve of the white dwarf HZ 4. We show that this flux variation was caused by the main-belt asteroid 4382 Stravinsky …

Anomalous flux event in the TESS Sector 43 light curve of the white dwarf photometric standard HZ 4 was caused by a passing asteroid Open

Keaton J. Bell, D. R. Ardila, Alexandra Frymire · 2023

Frymire & Ardila (2023) reported an anomalous flux variation in the Transiting Exoplanet Survey Satellite (TESS) Sector 43 light curve of the white dwarf HZ 4. We show that this flux variation was caused by the main-belt asteroid 4382 Stra…

Discovery of a Surprising Flux Event in White Dwarf HZ 4 Open

Alexandra Frymire, D. R. Ardila · 2023

HZ 4 is a DA3.4C White Dwarf (WD) and a commonly used photometric standard star. While analyzing its suitability as a calibrator, data from TESS revealed an increase in flux by 43.2%, seen only on Sector 43 observed in 2021 September and O…

Calibration Target Selection for the SPARCS Satellite Open

Alexandra Frymire, D. R. Ardila · 2023

The Star–Planet Activity Research CubeSat (SPARCS) is an upcoming NASA mission to understand the impact of low-mass stellar radiation on exoplanets. SPARCS will obtain photometric observations of low-mass stars in two bands: 153–171 nm (Fa…

EXOSpy: A python package to investigate the terrestrial exosphere and its FUV emission Open

Gonzalo Cucho‐Padin, Dolon Bhattacharyya, D. G. Sibeck, Hyunju Connor, Allison Youngblood , et al. · 2023

The exosphere is the uppermost layer of the terrestrial atmosphere, mainly composed of atomic hydrogen (H) that resonantly scatters solar far-ultraviolet (FUV) photons at 121.56 nm, also referred to as Lyman-Alpha (Ly- α ) emission. Analys…

The fundamentals of Lyman α exoplanet transits Open

James E. Owen, Ruth Murray‐Clay, Ethan Schreyer, Hilke E. Schlichting, D. R. Ardila , et al. · 2022

Lyman α transits have been detected from several nearby exoplanets and are one of our best insights into the atmospheric escape process. However, due to ISM absorption, we typically only observe the transit signature in the blue-wing, maki…

The Star-Planet Activity Research CubeSat (SPARCS): Determining Inputs to Planetary Habitability Open

D. R. Ardila, Evgenya L. Shkolnik, Paul A. Scowen, Daniel Jacobs, Dawn E. Gregory , et al. · 2022

Seventy-five billion low-mass stars in our galaxy host at least one small planet in their habitable zone (HZ). The stellar ultraviolet (UV) radiation received by the planets is strong and highly variable, and has consequences for atmospher…

The UV-SCOPE Mission: Ultraviolet Spectroscopic Characterization Of Planets and their Environments Open

D. R. Ardila, Evgenya L. Shkolnik, John Ziemer, Mark G. Swain, James E. Owen , et al. · 2022

UV-SCOPE is a mission concept to determine the causes of atmospheric mass loss in exoplanets, investigate the mechanisms driving aerosol formation in hot Jupiters, and study the influence of the stellar environment on atmospheric evolution…

The ODYSSEUS Survey. Motivation and First Results: Accretion, Ejection, and Disk Irradiation of CVSO 109 Open

Catherine Espaillat, Gregory J. Herczeg, Thanawuth Thanathibodee, Caeley V. Pittman, Nuria Calvet , et al. · 2022

The Hubble UV Legacy Library of Young Stars as Essential Standards (ULLYSES) Director’s Discretionary Program of low-mass pre-main-sequence stars, coupled with forthcoming data from Atacama Large Millimeter/submillimeter Array and James We…

Onboard Dynamic Image Exposure Control for the Star-Planet Activity Research CubeSat (SPARCS) Open

Tahina Ramiaramanantsoa, Judd D. Bowman, Evgenya L. Shkolnik, R. O. Parke Loyd, D. R. Ardila , et al. · 2021

The Star-Planet Activity Research CubeSat (SPARCS) is a 6U CubeSat under development to monitor the flaring and chromospheric activity of M dwarfs at near-ultraviolet (NUV) and far-ultraviolet (FUV) wavelengths. The spacecraft hosts two UV…

The fundamentals of Lyman-alpha exoplanet transits Open

James E. Owen, Ruth Murray‐Clay, Ethan Schreyer, Hilke E. Schlichting, D. R. Ardila , et al. · 2021

Lyman-$α$ transits have been detected from several nearby exoplanets and are one of our best insights into the atmospheric escape process. However, due to ISM absorption, we typically only observe the transit signature in the blue-wing, ma…

Time-Resolved Photometry of the High-Energy Radiation of M Dwarfs with the Star-Planet Activity Research CubeSat (SPARCS) Open

Tahina Ramiaramanantsoa, Judd D. Bowman, Evgenya L. Shkolnik, R. O. Parke Loyd, D. R. Ardila , et al. · 2021

Know thy star, know thy planet,... especially in the ultraviolet (UV). Over the past decade, that motto has grown from mere wish to necessity in the M dwarf regime, given that the intense and highly variable UV radiation from these stars i…

Dynamically Controlling Image Integration Onboard the Star-Planet Activity Research CubeSat (SPARCS) Open

Tahina Ramiaramanantsoa, Judd D. Bowman, Evgenya L. Shkolnik, R. O. Parke Loyd, D. R. Ardila , et al. · 2021

The Star-Planet Activity Research CubeSat (SPARCS) is a 6U CubeSat astronomical observatory underdevelopment and will be entirely dedicated to the photometric monitoring of the flaring activity of M dwarfs at near-UV (258 nm – 308 nm) and …

Human papilloma virus genotypes in dysplasia and epithelial hyperplasia of oral cavity using the luminex xmap technology. A multicenter study Open

SJ. Perdomo-Lara, MR. Buenahora, E. Álvarez, Farith González Martínez, Mauricio Rebolledo , et al. · 2019

HPV-.HRs are frequently found in hyperplastic and dysplastic epithelial lesions. HPV-HRs and HPV-16 were associated with dysplasia in urban population. Rural high risk population and urban population differ in the frequency and variety of …

Astro2020 APC White Paper: SmallSats for Astrophysics Open

D. R. Ardila, A. Freeman, Todd Gaier, Varoujan Gorjian, Evgenya L. Shkolnik , et al. · 2019

The commercial SmallSat industry is booming and has developed numerous low-cost, capable satellite buses. SmallSats can be used as vehicles for technology development or to host science missions. Missions hosted on SmallSats can answer spe…

ANUBIS - A Probe-Class UVO Space Observatory Open

Paul A. Scowen, Jon A. Morse, D. R. Ardila, Bala Balasubramanian, John Bally , et al. · 2019

Review: far-infrared instrumentation and technological development for the next decade Open

D. Farrah, K. Ennico Smith, D. R. Ardila, Charles M. Bradford, Michael DiPirro , et al. · 2019

Far-infrared astronomy has advanced rapidly since its inception in the late 1950s, driven by a maturing technology base and an expanding community of researchers. This advancement has shown that observations at far-infrared wavelengths are…

The Star-Planet Activity Research CubeSat (SPARCS): A Mission to Understand the Impact of Stars in Exoplanets Open

D. R. Ardila, Evgenya L. Shkolnik, Paul A. Scowen, April D. Jewell, Shouleh Nikzad , et al. · 2018

The Star-Planet Activity Research CubeSat (SPARCS) is a NASA-funded astrophysics mission, devoted to the study of the ultraviolet (UV) time-domain behavior in low-mass stars. Given their abundance and size, low-mass stars are important tar…

The Star-Planet Activity Research CubeSat (SPARCS): A Mission to\n Understand the Impact of Stars in Exoplanets Open

D. R. Ardila, Evgenya L. Shkolnik, Paul A. Scowen, April D. Jewell, Shouleh Nikzad , et al. · 2018

The Star-Planet Activity Research CubeSat (SPARCS) is a NASA-funded\nastrophysics mission, devoted to the study of the ultraviolet (UV) time-domain\nbehavior in low-mass stars. Given their abundance and size, low-mass stars are\nimportant …

Kuiper belt analogues in nearby M-type planet-host systems Open

Grant M. Kennedy, G. Bryden, D. R. Ardila, C. Eiroa, J. F. Lestrade , et al. · 2018

We present the results of a Herschel survey of 21 late-type stars that host planets discovered by the radial velocity technique. The aims were to discover new discs in these systems and to search for any correlation between planet presence…

Finding the UV–Visible Path Forward: Proceedings of the Community Workshop to Plan the Future of UV/Visible Space Astrophysics Open

Paul A. Scowen, Todd M. Tripp, Matt Beasley, D. R. Ardila, B. G. Andersson , et al. · 2017

We present the science cases and technological discussions that came from the\nworkshop entitled "Finding the UV-Visible Path Forward" held at NASA GSFC June\n25-26, 2015. The material presented outlines the compelling science that can be\…

ACCRETION AND MAGNETIC RECONNECTION IN THE CLASSICAL T TAURI BINARY DQ TAU Open

Benjamin M. Tofflemire, Robert D. Mathieu, D. R. Ardila, Rachel Akeson, David R. Ciardi , et al. · 2017

The theory of binary star formation predicts that close binaries ( a < 100 au) will experience periodic pulsed accretion events as streams of material form at the inner edge of a circumbinary disk (CBD), cross a dynamically cleared gap, an…

Two Aerospace Corporation CubeSat Remote Sensing Imagers: CUMULOS and R3 Open

Dee William Pack, D. R. Ardila, Eric Herman, Darren Rowen, Richard Welle , et al. · 2017

For remote sensing missions, the fractionated functionality of CubeSats provides a potential way to reduce cost and risks while maintaining comparable operational capabilities. This paper describes two CubeSat remote sensing missions devel…

The Cubesat Multispectral Observation System (CUMULOS) Open

D. R. Ardila, Dee William Pack · 2016

NASA’s Integrated Solar Array and Reflectarray Antenna (ISARA) payload is hosted by a 3U cubesat being built by The Aerospace Corporation. The spacecraft will be launched on a low-Earth orbit during the summer of 2016.\nThe small size of t…

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